US10850010B2 - Stent - Google Patents
Stent Download PDFInfo
- Publication number
- US10850010B2 US10850010B2 US16/075,367 US201716075367A US10850010B2 US 10850010 B2 US10850010 B2 US 10850010B2 US 201716075367 A US201716075367 A US 201716075367A US 10850010 B2 US10850010 B2 US 10850010B2
- Authority
- US
- United States
- Prior art keywords
- strands
- stent
- platinum alloy
- alloy material
- even number
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active, expires
Links
- 229910001260 Pt alloy Inorganic materials 0.000 claims abstract description 38
- 239000000956 alloy Substances 0.000 claims abstract description 34
- 238000009954 braiding Methods 0.000 claims abstract description 13
- 238000004804 winding Methods 0.000 claims description 15
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910000566 Platinum-iridium alloy Inorganic materials 0.000 claims description 5
- HWLDNSXPUQTBOD-UHFFFAOYSA-N platinum-iridium alloy Chemical class [Ir].[Pt] HWLDNSXPUQTBOD-UHFFFAOYSA-N 0.000 claims description 5
- 229910002835 Pt–Ir Inorganic materials 0.000 description 28
- 239000011651 chromium Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001000 nickel titanium Inorganic materials 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 3
- 238000002513 implantation Methods 0.000 description 3
- 229910000599 Cr alloy Inorganic materials 0.000 description 2
- KHYBPSFKEHXSLX-UHFFFAOYSA-N iminotitanium Chemical compound [Ti]=N KHYBPSFKEHXSLX-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 206010002329 Aneurysm Diseases 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/02—Inorganic materials
- A61L31/022—Metals or alloys
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/88—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure the wire-like elements formed as helical or spiral coils
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
- A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L31/00—Materials for other surgical articles, e.g. stents, stent-grafts, shunts, surgical drapes, guide wires, materials for adhesion prevention, occluding devices, surgical gloves, tissue fixation devices
- A61L31/14—Materials characterised by their function or physical properties, e.g. injectable or lubricating compositions, shape-memory materials, surface modified materials
Definitions
- the present invention relates to a stent.
- the stent is formed by helicoidally braiding a plurality of strands (see Patent Literature 1).
- Patent Literature 1 JP 2012-223209 A
- a stent formed by helicoidally braiding a plurality of strands is used for the purpose of medical treatment of an aneurysm.
- metal strands such as a stainless steel, a Co—Cr alloy (cobalt-chromium alloy), a Ni—Ti alloy (nickel-titanium alloy) are generally used. These materials have a transmissive property with respect to an X ray. Therefore, the stent implanted in a blood vessel of a patient may be not captured at the time of an X-ray photography, and thus it is not possible to check the implantation position of the stent of the patient.
- the stent is made of a platinum alloy material having a non-transmissive property with respect to the X ray.
- the strand made of the platinum alloy material is degraded in an extending performance compared to a typical strand. Therefore, when the number of strands made of the platinum alloy material in the stent is set to an odd number, there is a concern that the stent does not evenly extend.
- the related art fails in studying a method of determining, the number of strands made of the platinum alloy material in consideration of the problem.
- the stent is formed by helicoidally braiding a plurality of strands. Some even-numbered strands among the plurality of strands are disposed using a strand made of a platinum alloy material.
- the stent of the first aspect is configured such that two strands among the plurality of strands are disposed using a strand made of the platinum alloy material.
- the stent of the first or second aspect is configured such that strands in the same winding direction among the plurality of strands are disposed using the strand made of the platinum alloy material.
- the stent of the first to third aspects is configured such that the plurality of strands are strands made of a cobalt-chromium alloy material, and the strand made of the platinum alloy material is a strand made of a platinum-iridium alloy material.
- some even-numbered strands among the plurality of strands are disposed using a strand made of a platinum alloy material, so that it is possible to make the stent extend evenly when the stent extends.
- FIG. 1 is a diagram schematically illustrating a shape of a stent formed by helicoidally braiding a plurality of strands.
- FIG. 2 is a diagram schematically illustrating an exemplary layout of a platinum alloy wire in a developed view of the stent.
- FIG. 3 is a diagram schematically illustrating an exemplary layout of the platinum alloy wire in a side view of the stent.
- FIG. 1 is a diagram schematically illustrating a shape of a stent in the embodiment.
- a stent 10 is assumed to be formed by helicoidally braiding a plurality of strands as illustrated in FIG. 1 .
- a metal material such as a stainless steel, a Co—Cr alloy (cobalt-chromium alloy), and a Ni—Ti alloy (nickel-titanium alloy) is used.
- the stent 10 is formed by helicoidally braiding a plurality of metal strands.
- the number of strands of the stent 10 has a plurality of types. For example, a 16-strand stent formed by braiding 16 strands, a 24-strand stent formed by braiding 24 strands, and a 32-strand stent formed by braiding 32 strands. Further, FIG. 1 illustrates the 16-strand stent.
- the metal strand has a transmissive property with respect to an X ray. Therefore, at the time of an X-ray photography, the stent in a patient cannot be captured, and the implantation position of the stent of the patient cannot be checked.
- some strands among the plurality of strands of the stent are disposed using a strand made of a platinum alloy material having a non-transmissive property with respect to the X ray.
- Pt—Ir strand the strands made of a platinum-iridium alloy material are disposed such that a plurality of the strands (for example, 2 adjacent strands) are adjacent in the stent configured by strands (hereinafter, referred to as “Co—Cr strands”) made of the cobalt-chromium alloy.
- FIG. 2 is a diagram schematically illustrating an exemplary layout of the Pt—Ir strands in a developed view of the 16-strand stent.
- eight strands are braided in a first direction inclined on a right upper side and a second direction inclined on a left upper side.
- the numbers attached in the upper and lower portion of the developed view are only attached for the convenience' sake in order to help with understanding that the strands are continuously disposed, and there is no other meaning.
- the numbers attached on the upper portion of the developed view indicate that the strands are continuously disposed in the first direction inclining on the right upper side in FIG. 2 .
- the same number on the upper portion indicates one strand which is wound in the first direction.
- the number attached on the lower portion of the developed view indicates that the strands wound in the second direction inclined on the left upper side in FIG. 2 are continuously disposed.
- the strands attached with the same number in the lower portion indicate one strand which is wound in the second direction.
- the even-numbered strands in the same winding direction among the Co—Cr strands of the stent are disposed using the Pt—Ir strands.
- a Pt—Ir strand 2 a depicted with a thick line is disposed at a strand 3 wound in the first direction.
- a Pt—Ir strand 2 b depicted with a thick line is disposed at a strand 7 wound in the first direction.
- two Pt—Ir strands 2 a and 2 b are disposed with respect to the Co—Cr strand 3 and the Co—Cr strand 7 wound in the first direction.
- the reason why two Pt—Ir strands are wound in the same direction is as follows.
- an interval of two Pt—Ir strands is different depending on a portion of the stent as illustrated in FIG. 3( a ) .
- the interval between two Pt—Ir strands 2 a and 2 b is widened at a position 3 a on the stent as illustrated in FIG. 3( a ) , but the interval between two Pt—Ir strands 2 a and 2 b becomes narrow at a position 3 b .
- a portion between the Pt—Ir strands 2 a and 2 b is plastically deformed. Therefore, a cross-sectional shape of the stent at the position 3 a and a cross-sectional shape of the stent at the position 3 b are different. In this way, in a case where two Pt—Ir strands are disposed in different winding directions, the cross-sectional shape of the stent is changed depending on a position on the stent.
- a stent which is formed by helicoidally braiding a plurality of strands, some even-numbered strands among the plurality of strands are disposed using, a PT-Ir strand made of a platinum alloy material.
- platinum has a non-transmissive property with respect to the X ray, it is possible to check an implantation position of the stent at the time of an X-ray photography. Further, it is possible to make the stent extend evenly when the stent extends.
- the stent of the embodiment may be modified as follows.
- the Pt—Ir strands made of a platinum-iridium alloy material are disposed as two strands made of a platinum alloy material disposed in the stent.
- the strand is not limited to the Pt—Ir strand as long as the material is suitable to dispose the stent and an alloy containing platinum having a non-transmissive property with respect to the X ray is used.
- the invention is not limited to any one of the configurations of the above-described embodiment as long as the characteristic functions of the invention are not degraded.
Landscapes
- Health & Medical Sciences (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Epidemiology (AREA)
- Surgery (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Cardiology (AREA)
- Transplantation (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Media Introduction/Drainage Providing Device (AREA)
- Materials For Medical Uses (AREA)
Abstract
Description
- 10 stent
- 2 a first platinum alloy wire
- 2 b second platinum alloy wire
Claims (16)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016-033783 | 2016-02-25 | ||
JP2016033783 | 2016-02-25 | ||
PCT/JP2017/006518 WO2017146080A1 (en) | 2016-02-25 | 2017-02-22 | Stent |
Publications (2)
Publication Number | Publication Date |
---|---|
US20190046694A1 US20190046694A1 (en) | 2019-02-14 |
US10850010B2 true US10850010B2 (en) | 2020-12-01 |
Family
ID=59685699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/075,367 Active 2037-05-14 US10850010B2 (en) | 2016-02-25 | 2017-02-22 | Stent |
Country Status (3)
Country | Link |
---|---|
US (1) | US10850010B2 (en) |
JP (1) | JP6558843B2 (en) |
WO (1) | WO2017146080A1 (en) |
Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5741325A (en) * | 1993-10-01 | 1998-04-21 | Emory University | Self-expanding intraluminal composite prosthesis |
US5843175A (en) * | 1997-06-13 | 1998-12-01 | Global Therapeutics, Inc. | Enhanced flexibility surgical stent |
US7438712B2 (en) * | 2003-03-05 | 2008-10-21 | Scimed Life Systems, Inc. | Multi-braid exterior tube |
US20090054972A1 (en) * | 2004-11-10 | 2009-02-26 | Boston Scientific, Scimed, Inc. | Atraumatic stent with reduced deployment force, method for making the same and method and apparatus for deploying and positioning the stent |
US20120265294A1 (en) | 2011-04-14 | 2012-10-18 | Asahi Intecc Co., Ltd. | Stent |
US20130204350A1 (en) * | 2003-06-27 | 2013-08-08 | Medinol Ltd. | Helical hybrid stent |
US20130282108A1 (en) * | 2009-11-17 | 2013-10-24 | Vascular Flow Technologies Limited | Tubular Conduit |
US20140288637A1 (en) | 2007-04-16 | 2014-09-25 | Boston Scientific Scimed, Inc. | Radiopaque Compositions, Stents and Methods of Preparation |
DE102015107291A1 (en) | 2014-05-28 | 2015-09-17 | Acandis Gmbh & Co. Kg | stent |
US20160143754A1 (en) * | 2008-11-24 | 2016-05-26 | Vascular Graft Solutions Ltd. | Implant for supporting bodily conduits such as blood vessels or/and grafted vessels |
US20160175085A1 (en) * | 2013-03-14 | 2016-06-23 | Volcano Corporation | Enhanced fluorogenic endoluminal filter structure |
US20180271682A1 (en) * | 2015-10-20 | 2018-09-27 | Cook Medical Technologies Llc | Woven stent device and manufacturing method |
US20180272044A1 (en) * | 2013-09-13 | 2018-09-27 | Abbott Cardiovascular Systems Inc. | Braided scaffolds |
US20190046340A1 (en) * | 2016-02-25 | 2019-02-14 | Pentas Inc. | Stent |
US20190133800A1 (en) * | 2005-08-22 | 2019-05-09 | Incept, Llc | Apparatus and methods for delivering stents |
US20190201218A1 (en) * | 2016-10-04 | 2019-07-04 | Yasuhiro Shobayashi | Flexible stent |
US20190262151A1 (en) * | 2018-02-28 | 2019-08-29 | Cook Medical Technologies Llc | Woven stent device with capped ends and manufacturing method |
US10470902B2 (en) * | 2006-10-22 | 2019-11-12 | Idev Technologies, Inc. | Secured strand end devices |
US20190365548A1 (en) * | 2016-05-16 | 2019-12-05 | Elixir Medical Corporation | Uncaging stent |
-
2017
- 2017-02-22 WO PCT/JP2017/006518 patent/WO2017146080A1/en active Application Filing
- 2017-02-22 US US16/075,367 patent/US10850010B2/en active Active
- 2017-02-22 JP JP2018501723A patent/JP6558843B2/en active Active
Patent Citations (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5741325A (en) * | 1993-10-01 | 1998-04-21 | Emory University | Self-expanding intraluminal composite prosthesis |
US5843175A (en) * | 1997-06-13 | 1998-12-01 | Global Therapeutics, Inc. | Enhanced flexibility surgical stent |
US7438712B2 (en) * | 2003-03-05 | 2008-10-21 | Scimed Life Systems, Inc. | Multi-braid exterior tube |
US20130204350A1 (en) * | 2003-06-27 | 2013-08-08 | Medinol Ltd. | Helical hybrid stent |
US20090054972A1 (en) * | 2004-11-10 | 2009-02-26 | Boston Scientific, Scimed, Inc. | Atraumatic stent with reduced deployment force, method for making the same and method and apparatus for deploying and positioning the stent |
US20190133800A1 (en) * | 2005-08-22 | 2019-05-09 | Incept, Llc | Apparatus and methods for delivering stents |
US10470902B2 (en) * | 2006-10-22 | 2019-11-12 | Idev Technologies, Inc. | Secured strand end devices |
US20140288637A1 (en) | 2007-04-16 | 2014-09-25 | Boston Scientific Scimed, Inc. | Radiopaque Compositions, Stents and Methods of Preparation |
US20160143754A1 (en) * | 2008-11-24 | 2016-05-26 | Vascular Graft Solutions Ltd. | Implant for supporting bodily conduits such as blood vessels or/and grafted vessels |
US20130282108A1 (en) * | 2009-11-17 | 2013-10-24 | Vascular Flow Technologies Limited | Tubular Conduit |
JP2012223209A (en) | 2011-04-14 | 2012-11-15 | Asahi Intecc Co Ltd | Stent |
US20120265294A1 (en) | 2011-04-14 | 2012-10-18 | Asahi Intecc Co., Ltd. | Stent |
US9039754B2 (en) * | 2011-04-14 | 2015-05-26 | Asahi Intecc Co., Ltd. | Stent |
US20160175085A1 (en) * | 2013-03-14 | 2016-06-23 | Volcano Corporation | Enhanced fluorogenic endoluminal filter structure |
US20180272044A1 (en) * | 2013-09-13 | 2018-09-27 | Abbott Cardiovascular Systems Inc. | Braided scaffolds |
DE102015107291A1 (en) | 2014-05-28 | 2015-09-17 | Acandis Gmbh & Co. Kg | stent |
US20180271682A1 (en) * | 2015-10-20 | 2018-09-27 | Cook Medical Technologies Llc | Woven stent device and manufacturing method |
US20190046340A1 (en) * | 2016-02-25 | 2019-02-14 | Pentas Inc. | Stent |
US20190365548A1 (en) * | 2016-05-16 | 2019-12-05 | Elixir Medical Corporation | Uncaging stent |
US20190201218A1 (en) * | 2016-10-04 | 2019-07-04 | Yasuhiro Shobayashi | Flexible stent |
US20190262151A1 (en) * | 2018-02-28 | 2019-08-29 | Cook Medical Technologies Llc | Woven stent device with capped ends and manufacturing method |
Non-Patent Citations (1)
Title |
---|
International Search Report dated May 16, 2017 filed in PCT/JP2017/006518. |
Also Published As
Publication number | Publication date |
---|---|
JPWO2017146080A1 (en) | 2018-12-20 |
US20190046694A1 (en) | 2019-02-14 |
WO2017146080A1 (en) | 2017-08-31 |
JP6558843B2 (en) | 2019-08-14 |
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